April Fool’s Day: What Came First? The UX Chicken or the UI Egg?

We UXers don’t really care what came first – the chicken or the egg. But when we start an argument on what came first – UX or UI, we may never be able to get back to work. This funny video compares the chicken and egg dilemma to UX and UI, but still doesn’t really settle this endless argument. So, what came first?